Timing controller for controlling emission of emission element for recognizing touch coordinates and electronic device including the same

ABSTRACT

Disclosed is a timing controller including a coordinate data generation circuit configured to generate X coordinate emission data for acquiring X coordinates and Y coordinate emission data for acquiring Y coordinates of touch coordinates, a selection circuit configured to time-divide 1 frame duration, to output the X coordinate emission data to a display driving circuit during an X coordinate field, and to output the Y coordinate emission data to the display driving circuit during a Y coordinate field, and a control data generation circuit configured to output control data for allowing each pixel to emit light in units of data line groups including i data lines using the X coordinate emission data during the X coordinate field and for allowing each pixel to emit light in units of gate lines including j gate lines using the Y coordinate emission data during the Y coordinate field, to the display driving circuit.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No.10-2020-0015679, filed on Feb. 10, 2020, which is hereby incorporated byreference as if fully set forth herein.

FIELD

The present disclosure relates to a display device, and moreparticularly to a display device for recognizing touch coordinates.

BACKGROUND

Along with the development of the information age, demands for displaydevices have increased in various forms. Recently, various types ofdisplay devices such as a liquid crystal display device (LCD) or anorganic light emitting display device (OLED) have been used.

Recently, a display device including a touch screen panel for detectinga touch input through a user's finger, a stylus pen, or the like insteadof a general input method such as a button, a key board, or a mouse hasbeen widely used. Most of display devices including a touch screen panelneed to include a touch sensing device or a touch integrated circuit(IC) for accurately detecting whether there is a touch or touchcoordinates (or a touch position).

That is, a general display device requires a touch sensing device or atouch IC as well as a separate touchscreen panel in order to detect atouch input through a user's finger, a stylus pen, or the like, andaccordingly, there is a problem in that a manufacturing process of adisplay device is complicated and manufacturing costs of the displaydevice is also inevitably increased.

SUMMARY

Therefore, the present disclosure has been made in view of the aboveproblems, and it is an object of the present disclosure to provide atiming controller and an electronic device including the same forsensing touch coordinates of a pen that comes into contact with adisplay panel using light emitted from a self-emission element includedin a pixel of a display panel.

The present disclosure may also provide a timing controller and anelectronic device including the same for outputting emission data foracquiring touch coordinates of a pen that comes into contact with adisplay panel and image data for displaying an actual image bytime-dividing 1 frame duration.

The present disclosure may also provide a timing controller and anelectronic device including the same for varying the number of pixelssupposed to emit light to acquire touch coordinates depending on theresolution and coordinate precision value of a display panel.

The present disclosure may also provide a timing controller and anelectronic device including the same for allowing a pixel supposed toemit light with random color to acquire touch coordinates.

In accordance with an aspect of the present disclosure, the above andother objects can be accomplished by the provision of a timingcontroller for controlling emission of an emission element forrecognizing touch coordinates, including a coordinate data generationcircuit configured to generate X coordinate emission data for acquiringX coordinates and Y coordinate emission data for acquiring Y coordinatesof touch coordinates, a selection circuit configured to time-divide 1frame duration, to output the X coordinate emission data to a displaydriving circuit during an X coordinate field, and to output the Ycoordinate emission data to the display driving circuit during a Ycoordinate field, and a control data generation circuit configured tooutput control data for allowing each pixel to emit light in units ofdata line groups including i (i being a natural number equal to orgreater than 2) data lines using the X coordinate emission data duringthe X coordinate field and for allowing each pixel to emit light inunits of gate lines including j (j being a natural number equal to orgreater than 2) gate lines using the Y coordinate emission data duringthe Y coordinate field, to the display driving circuit.

In accordance with another aspect of the present disclosure, there isprovided an electronic device including a display panel comprising mdata line groups obtained by grouping w data lines in units of i (ibeing a natural number equal to or greater than 2) data lines and n gateline groups obtained by grouping h gate lines in units of j (j being anatural number equal to or greater than 2) gate lines, a timingcontroller configured to time-divide 1 frame duration, to generate Xcoordinate emission data for acquiring X coordinates of touchcoordinates and first control data during an X coordinate field, and togenerate Y coordinate emission data for acquiring Y coordinates andsecond control data during a Y coordinate field, and a display drivingcircuit configured to allow each pixel to emit light in units of thedata line groups using the X coordinate emission data according to thefirst control data during the X coordinate field and to allow each pixelto emit light in units of the gate line groups using the Y coordinateemission data according to the second control data during the Ycoordinate field.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and other advantages of thepresent disclosure will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1A is a block diagram of a display device including a timingcontroller according to an embodiment of the present disclosure;

FIG. 1B is a diagram showing arrangement of fields in 1 frame durationaccording to an embodiment of the present disclosure;

FIG. 1C is a diagram showing arrangement of fields in 1 frame durationaccording to another embodiment of the present disclosure;

FIGS. 2A and 2B are diagrams for explaining a method of determiningcoordinates by a pen;

FIG. 3 is a block diagram of the timing controller shown in FIG. 1;

FIG. 4 is a diagram showing an example of a method of generating a firstdata output enable signal by the control data generation circuit shownin FIG. 3;

FIGS. 5A and 5B is a diagram showing an example of a method ofarbitrarily setting color of emission data;

FIG. 6 is a diagram for explaining options of coordinate precision;

FIG. 7 is a diagram showing an example of a method of operating a timingcontroller according to another embodiment of the present disclosure;and

FIG. 8 is a block diagram of an electronic device including the displaydevice shown in FIG. 1.

DETAILED DESCRIPTION

In the specification, it should be noted that like reference numeralsalready used to denote like elements in other drawings are used forelements wherever possible. In the following description, when afunction and a configuration known to those skilled in the art areirrelevant to the essential configuration of the present disclosure,their detailed descriptions will be omitted. The terms described in thespecification should be understood as follows.

Advantages and features of the present disclosure, and implementationmethods thereof will be clarified through following embodimentsdescribed with reference to the accompanying drawings. The presentdisclosure may, however, be embodied in different forms and should notbe construed as limited to the embodiments set forth herein. Rather,these embodiments are provided so that this disclosure will be thoroughand complete, and will fully convey the scope of the present disclosureto those skilled in the art. Further, the present disclosure is onlydefined by scopes of claims.

A shape, a size, a ratio, an angle, and a number disclosed in thedrawings for describing embodiments of the present disclosure are merelyan example, and thus, the present disclosure is not limited to theillustrated details. Like reference numerals refer to like elementsthroughout. In the following description, when the detailed descriptionof the relevant known function or configuration is determined tounnecessarily obscure the important point of the present disclosure, thedetailed description will be omitted.

In a case where ‘comprise’, ‘have’, and ‘include’ described in thepresent specification are used, another part may be added unless ‘only˜’is used. The terms of a singular form may include plural forms unlessreferred to the contrary.

In construing an element, the element is construed as including an errorrange although there is no explicit description.

In describing a time relationship, for example, when the temporal orderis described as ‘after˜’, ‘subsequent˜’, ‘next˜’, and ‘before˜’, a casewhich is not continuous may be included unless ‘just’ or ‘direct’ isused.

It will be understood that, although the terms “first”, “second”, etc.may be used herein to describe various elements, these elements shouldnot be limited by these terms. These terms are only used to distinguishone element from another. For example, a first element could be termed asecond element, and, similarly, a second element could be termed a firstelement, without departing from the scope of the present disclosure.

The term “at least one” should be understood as including any and allcombinations of one or more of the associated listed items. For example,the meaning of “at least one of a first item, a second item, and a thirditem” denotes the combination of all items proposed from two or more ofthe first item, the second item, and the third item as well as the firstitem, the second item, or the third item.

Features of various embodiments of the present disclosure may bepartially or overall coupled to or combined with each other, and may bevariously inter-operated with each other and driven technically as thoseskilled in the art can sufficiently understand. The embodiments of thepresent disclosure may be carried out independently from each other, ormay be carried out together in co-dependent relationship.

Reference will now be made in detail to the exemplary embodiments of thepresent disclosure with reference to the accompanying drawings.

FIG. 1A is a block diagram of a display device including a timingcontroller according to an embodiment of the present disclosure.Referring to FIG. 1A, a display device 100 may include a timingcontroller 110, a source driving circuit 120, a gate driving circuit130, and a display panel 140.

The display device 100 may be a self-emissive display device includingthe display panel 140 in which pixels P including self-emission elementsare arranged in a matrix form. For example, the display device 100 maybe a display device for a television (TV), a display device fornavigation, a display device for a computer monitor, or a display devicefor a mobile terminal.

The timing controller 110 may generate source control data SCD forcontrolling operations of the source driving circuit 120 and gatecontrol data GCD for controlling operations of the gate driving circuit130 using timing control data (TCTR) (e.g., the timing control data(TCTR) may include a vertical synchronization signal Vsync, a horizontalsynchronization signal Hsync, a dot clock signal DCLK, and a data enablesignal DE).

In particular, the timing controller 110 according to the presentdisclosure may operate the source driving circuit 120 and the gatedriving circuit 130 in a normal mode in which an image is displayedusing light emitted from a self-emission element and a touch mode inwhich touch coordinates are acquired using light emitted from theself-emission element.

To this end, as shown in FIG. 1B, a 1 frame duration 1F according to thepresent disclosure may include a display field DF in which the displaydevice 100 is operated in a normal mode, an X coordinate field XCF inwhich the display device 100 is operated in a touch mode for acquiring Xcoordinates of touch coordinates, and a Y coordinate field YCF in whichthe display device 100 is operated in a touch mode for acquiring Ycoordinates of touch coordinates.

In this case, the touch coordinates may be acquired while satisfying ageneral reference (e.g., 120 Hz or 60 Hz) required for displaying animage by arranging the X coordinate field XCF and the Y coordinate fieldYCF in a rest period in the display field DF or by reducing a time of avertical blank Vblank section, a Vbackporch section, a Vfrontporchsection, or a DE blank section and arranging the X coordinate field XCFand the Y coordinate field YCF therein.

As such, according to the present disclosure, as the display field DFand coordinate fields (the X coordinate field XCF and the Y coordinatefield YCF) are separately executed in the 1 frame duration, an imagedisplayed on the display panel 140 during the display field DF may notbe affected by an image displayed on the display panel 140 duringcoordinate fields (the X coordinate field XCF and the Y coordinate fieldYCF).

In FIG. 1B, the case in which the display field DF, the X coordinatefield XCF, and the Y coordinate field YCF are arranged in the statedorder according to the vertical synchronization signal Vsync (e.g., thevertical blank Vblank section) in the 1 frame duration has beendescribed. However, this is merely an example, and as shown in FIG. 1C,according to the vertical synchronization signal Vsync (e.g., thevertical blank Vblank section), the X coordinate field XCF, the Ycoordinate field YCF, and the display field DF may be arranged in thestated order (CASE1), the Y coordinate field YCF, the X coordinate fieldXCF, and the display field DF may be arranged in the stated order(CASE2), or the display field DF, the Y coordinate field YCF, and the Xcoordinate field XCF may be arranged in the stated order (CASE3).

According to an embodiment, the source control data SCD generated by thetiming controller 110 may include a source start pulse SSP forcontrolling data sampling start timing, a source sampling clock SSC thatis a clock signal for controlling sampling timing of data, a first dataoutput enable signal for controlling timing at which a first datavoltage for displaying an image through data lines DL1 to DLw is to beoutput, a second data output enable signal for controlling timing atwhich a second data voltage for acquiring X coordinates through the datalines DL1 to DLw is to be output, and a third data output enable signalfor controlling timing at which a third data voltage for acquiring Ycoordinates through the data lines DL1 to DLw is to be output.

In the aforementioned embodiment, the vertical synchronization signalVsync may be a signal indicating a start timing when one frame begins,the horizontal synchronization signal Hsync may be a signal indicating astart timing when one line begins, the first data output enable signalmay be a signal including at least one data pulse indicating a timeperiod in which a first data voltage is input to the data lines DL1 toDLw during the display field DF, the second data output enable signalmay be a signal including at least one data pulses indicating a timeperiod in which a second data voltage is input to the data lines DL1 toDLw during the X coordinate field XCF, and the third data output enablesignal may be a signal including at least one data pules indicating atime period in which a third data voltage is input to the data lines DL1to DLw during the Y coordinate field YCF.

The gate control data GCD generated by the timing controller 110 mayinclude a gate start pulse GSP, a gate shift clock GSC, and a gateoutput enable signal. The gate start pulse GSP may control operationstart timing of a plurality of gate driver ICs (not shown) included inthe gate driving circuit 130. The gate shift clock GSC may be a clocksignal that is commonly input to one or more gate driver ICs and maycontrol shift timing of a gate pulse. The gate output enable signal mayspecify timing information of one or more gate driver ICs.

In this case, the gate output enable signal may include a first gateoutput enable signal for selecting gate lines GL1 to GLh connected topixels that emit light depending on the first data voltage during thedisplay field DF, a second gate output enable signal for selecting thegate lines GL1 to GLh connected to pixels that emit light depending onthe second data voltage during the X coordinate field XCF, and a thirdgate output enable signal for selecting the gate lines GL1 to GLhconnected to pixels that emit light depending on the third data voltageduring the Y coordinate field YCF.

The first gate output enable signal may be formed in such a way that agate pulse is applied to each of the gate lines GL1 to GLh to drive thegate lines GL1 to GLh using a row sequential method, the second gateoutput enable signal may be formed to simultaneously input a gate pulseto all the gate lines GL1 to GLh while the second data voltage isapplied through the data lines DL1 to DLw, and the third gate outputenable signal may be formed to shift a gate pulse in units of apredetermined number of the gate lines GL1 to GLh and to simultaneouslyapply the gate pulse to the predetermined number of gate lines GL1 toGLh while the third data voltage is applied to all the data lines DL1 toDLw.

The timing controller 110 may convert image data Idata received from amain chip (not shown) into image data Idata′ to be processed by thesource driving circuit 120 and may transmit the converted data to thesource driving circuit 120. The timing controller 110 may generate Xcoordinate emission data Tdata_X for acquiring X coordinates and Ycoordinate emission data Tdata_Y for acquiring Y coordinates and maytransmit the same to the source driving circuit 120.

According to an embodiment, the main chip may be a chip included in anyone of a television (TV) system, a navigation system, a set-top box, aDVD player, a blu-ray player, a personal computer (PC), a home theatersystem, a broadcast receiver, and a phone system.

A display driving circuit may include the source driving circuit 120 andthe gate driving circuit 130 and may be operated in a normal mode or atouch mode under control of the timing controller 110.

In detail, the display driving circuit may output a first data voltagecorresponding to image data Idata′ transmitted from the timingcontroller 110 through the display panel 140 or detect thecharacteristics of driving elements included in each pixel P while beingdriven in a normal mode. The display driving circuit may output a seconddata voltage and a third data voltage that respectively correspond tothe X coordinate emission data Tdata_X and the Y coordinate emissiondata Tdata_Y for acquiring touch coordinates using a touch of a pen 150through the display panel 140 while being driven in a touch mode.

That is, the display driving circuit according to the present disclosuremay sequentially allow the pixels P to emit light by applying the firstdata voltage to a corresponding data line according to source controldata during the display field DF and driving gate lines according to thegate control data using a row sequential method. The display drivingcircuit according to the present disclosure may allow the pixels P toemit light in units of i data lines (i being a natural number equal toor greater than 1) using the second data voltage during the X coordinatefield XCF and may allow the pixels P to emit light in units of j gatelines (j being a natural number equal to or greater than 1) using thethird data voltage during the Y coordinate field YCF, and accordingly,the pen 150 may acquire touch coordinates by detecting light emittedfrom the pixel P.

Hereinafter, the source driving circuit 120 and the gate driving circuit130 will be described in more detail.

The source driving circuit 120 may include a plurality of source driverICs (not shown), may be driven in a normal mode during the display fieldDF under control of the timing controller 110, and may be driven in atouch mode during the X coordinate field XCF and the Y coordinate fieldYCF.

In detail, the source driving circuit 120 may be operated in a normalmode during the display field DF to convert the image data Idata′ intothe first data voltage according to the source control data SCDtransmitted from the timing controller 110 and to supply the convertedfirst data voltages to the pixels P through the data lines DL1 to DLw.In particular, the source driving circuit 120 may output the first datavoltage to a corresponding data line during a period in which datapulses included in the first data output enable signal are in a highlevel.

The source driving circuit 120 may be operated in a normal mode duringthe display field DF, may generate data voltages for sensing using thesource control data SCD in order to sense the characteristics of adriving element (e.g., a driving transistor (TFT)) included in eachpixel P, and may supply the data voltages for sensing to the pixels Pthrough the data lines DL1 to DLw. According to an embodiment, thecharacteristics of a driving element may include at least one of athreshold voltage or mobility of the driving element.

The source driving circuit 120 may be operated in a touch mode duringthe X coordinate field XCF to convert the X coordinate emission dataTdata_X transmitted from the timing controller 110 into the second datavoltage. The source driving circuit 120 may output the second datavoltage to a predetermined number of data lines (for example, i datalines) while sequentially shifting the data lines DL1 to DLw in unit ofi data lines according to the source control data SCD transmitted fromthe timing controller 110. In particular, the source driving circuit 120may output the second data voltage to corresponding data lines during aperiod in which data pulses included in the second data output enablesignal are in a high level.

According to an embodiment, a second data voltage may be set todifferent values (e.g., different grayscale values or different colors)for respective lines to which the second data voltage is to be output.For example, a value of a second data voltage applied to a data line #1and a value of the second data voltage applied to a data line #2 may bedifferent from each other.

In this case, i may be set to 1 or a value equal to or greater than 2.That is, when i is set to 1, the source driving circuit 120 may allowpixels connected to one data line to simultaneously emit light in unitsof 1 data line, and when i is set to a value equal to or greater than 2,the source driving circuit 120 may set two or more data lines to onedata line group and allow pixels connected to a corresponding data linegroup to simultaneously emit light in units of a data line group.

According to an embodiment, when i is set to a value equal to or greaterthan 2, the value of i may be determined depending on at least one of apredetermined X coordinate precision value or an X-direction resolutionvalue of the display panel 140.

The source driving circuit 120 may be operated in a touch mode duringthe Y coordinate field YCF to convert the Y coordinate emission dataTdata_Y transmitted from the timing controller 110 into a third datavoltage and to simultaneously output the third data voltage through allof the data lines DL1 to DLw according to the source control data SCDtransmitted from the timing controller 110. In this case, a value (e.g.,a grayscale value or color) of the third data voltage may be differentlyset for each gate line selected to output the third data voltage. Forexample, a value of a third data voltage applied to all of the datalines DL1 to DLw when a gate line #1 is selected and a value of thethird data voltage applied to all of the data lines DL1 to DLw when agate line #2 is selected may be from each other.

According to the aforementioned embodiment, the source driving circuit120 may output the third data voltage to all data lines during a periodin which a data pulse included in the third data output enable signal isin a high level.

The gate driving circuit 130 may be operated in a normal mode during thedisplay field DF and may sequentially supply gate pulses to the gatelines GL1 to GLh to operate gate lines for displaying an image accordingto the gate control data GCD transmitted from the timing controller 110using a row sequential method. The gate driving circuit 130 may generategate pulses for sensing using the gate control data GCD in order tosense the characteristics of a driving element included in each pixel Pduring the display field DF and may sequentially supply the gate pulsesfor sensing to the gate lines GL1 to GLh using a row sequential method.

The gate driving circuit 130 may be operated in a touch mode during theX coordinate field XCF and may simultaneously supply gate pulses throughall gate lines according to the gate control data GCD transmitted fromthe timing controller 110 to sequentially turn on the pixels P in unitsof i data lines. In this case, the gate pulses may be simultaneouslysupplied to the gate lines GL1 to GLh according to the second gateoutput enable signal.

The gate driving circuit 130 may be operated in the touch mode duringthe Y coordinate field YCF and may supply gate pulses in units of j gatelines according to the gate control data GCD transmitted from the timingcontroller 110 to sequentially turn on the pixels P in units of j gatelines. In this case, the gate pulses may be supplied in units of j gatelines according to the third gate output enable signal.

In this case, j may be set to 1 or a value equal to or greater than 2.That is, when j is set to 1, the gate driving circuit 130 may allowpixels connected to all of the data lines DL1 to DLw to simultaneouslyemit light in units of 1 gate line, and when j is set to 2, the gatedriving circuit 130 may set two or more gate lines to one gate linegroup and allow pixels connected to a corresponding gate line group tosimultaneously emit light in units of a gate line group.

According to an embodiment, when j is set to a value equal to or greaterthan 2, the value of j may be determined depending on at least one of apredetermined Y coordinate precision value or a Y-direction resolutionvalue of the display panel 140.

The display panel 140 may include the pixels P arranged in a matrix formof w×h, and each pixel P may be connected to a corresponding data lineamong the data lines DL1 to DLw, a corresponding sensing line amongsensing lines SL1 to SLw, and a corresponding gate line among the gatelines GL1 to GLh.

Each pixel P may display an image corresponding to the image data Idata′on the display panel 140 according to the respective gate pulses inputthrough the gate lines GL1 to GLh and the first data voltage inputthrough each of the data lines DL1 to DLw during the display field DF.Each pixel P may transmit a sensing signal to the source driving circuit120 through each of the sensing lines SL1 to SLw. The sensing signal isobtained by sensing the characteristics of a driving element included ina corresponding pixel P according to the data voltage for sensing inputthrough the data lines DL1 to DLw during the display field DF. Accordingto an embodiment, each pixel P may include an organic light-emittingdiode (OLED) as a self-emission element.

Each of the pixels P may sequentially emit light while being shifted inunits of i data lines according to gate pulses that are simultaneouslyinput through all of the gate lines GL1 to GLh and the second datavoltage input through the data lines DL1 to DLw connected to acorresponding pixel P during the X coordinate field XCF.

For example, during the X coordinate field XCF, the gate driving circuit130 may simultaneously supply gate pulses to all of the gate lines GL1to GLh arranged on the display panel 140 according to the second gateoutput enable signal output from the timing controller 110, and thesource driving circuit 120 may supply second data voltages whileshifting i data lines among the data lines DL1 to DLw arranged on thedisplay panel 140 according to the second data output enable signaloutput from the timing controller 110, and thus pixels connected tocorresponding data lines may emit light.

In this case, when second data voltages having different color ordifferent grayscale values are set for respective data lines to whichthe second data voltage is to be output, pixels connected tocorresponding data lines may emit light with different color ordifferent grayscale values for respective data lines.

Each of the pixels P may sequentially emit light while being shifted inunits of j gate lines according to a gate pulse input in units of j gatelines and third data voltages that are simultaneously input through allof the data lines DL1 to DLw during the Y coordinate field YCF.

For example, during the Y coordinate field YCF, the source drivingcircuit 120 may simultaneously supply third data voltages to all of thedata lines DL1 to DLw arranged on the display panel 140 according to thethird data output enable signal output from the timing controller 110,and the gate driving circuit 130 may supply gate pulses while shifting jgate lines among the gate lines GL1 to GLh arranged on the display panel140 according to the third gate output enable signal output from thetiming controller 110, and accordingly, pixels connected tocorresponding gate lines emit light.

In this case, when third data voltages having different color ordifferent grayscale values are set for respective gate lines selectedfor outputting the third data voltage, pixels connected to correspondinggate lines may emit light with different color or different grayscalevalues for respective gate lines.

The pen 150 may obtain touch coordinates of a pixel touched by the pen150 by detecting an emissive state of at least one pixel correspondingto the current position of the pen 150 via contact (or non-contact) withthe display panel 140. According to an embodiment, the touch coordinatesmay be defined by X coordinates and Y coordinates of a pixel in whichemission is detected. The pen 150 may transmit the obtained touchcoordinates to the main chip (not shown). According to an embodiment,the pen 150 may wirelessly transmit the touch coordinates to a hostsystem.

Hereinafter, with reference to FIG. 2, a method of determining touchcoordinates by the pen 150 will be described in detail. FIG. 2 is adiagram for explaining a method of determining coordinates by a pen.

FIG. 2A is a diagram showing the case in which one emission signal isdetected in an X coordinate field (or a Y coordinate field). The pen 150may determine a number of one data pulse among data pulses (CDE1˜CDEm)included in a second data enable signal as X coordinates. The one datapulse is corresponding to a time difference between a level transitiontiming (e.g., a rising edge timing) of a vertical synchronization signalPen Vsync of the pen 150 and a detection time at which emission isdetected in the X coordinate field XCF. In FIG. 2A, the one data pulseis a first data pulse CDE1 among the data pulses. At this time, thevertical synchronization signal Pen Vsync of the pen 150 is synchronizedwith a vertical synchronization signal Panel Vsync of the display panel140.

In this case, the pen 150 may acquire information on a differencebetween the rising edge timing of the vertical synchronization signaland the timing at which an initial data pulse among data pulses includedin the second data output enable signal is generated (or a differencebetween the rising edge timing of the vertical synchronization signaland the timing at which an X coordinate field is started) andinformation on a duration time of one data pulse from the display panel140 during an initial synchronization procedure with the display panel140. Accordingly, the pen 150 may determine an ordinal number of a datapulse, corresponding to the timing at which emission is detected, amongdata pulses included in the second data output enable signal (or thethird data output enable signal) using a time difference between thevertical synchronization signal and the timing at which emission isdetected, and may determine an ordinal number of the data pulse in whichemission is detected, as X coordinates.

Similarly, in the case of Y coordinates, the pen 150 may determine anordinal number of a data pulse included in the third data output enablesignal, corresponding to a time difference between the level transitiontiming (e.g., a rising edge timing) of the vertical synchronizationsignal of the pen 150 and a detection timing at which emission isdetected in the Y coordinate field YCF, as Y coordinates.

As shown in FIG. 2B, when a plurality of emission signals is detected inthe X coordinate field (or the Y coordinate field), the pen 150 maycalculate ordinal numbers of data pulses corresponding to the respectivedetection timings at which emission is detected or may determine any oneof data pulses, corresponding to the respective detection timings atwhich emission is detected, as X coordinates (or Y coordinates). In thiscase, a method of determining an ordinal number of a data pulsecorresponding to each detection timing is the same as that of FIG. 2A,and thus a detailed description thereof will be omitted.

According to a first embodiment, the pen 150 may determine an ordinalnumber of a data pulse CDE2, corresponding to the timing at which theemission signal is detected earliest in time, among data pulses CDE2 toCDE5 corresponding to the respective detection timings at which theemission signal is detected, as X coordinates (or Y coordinates).

According to a second embodiment, the pen 150 may determine an average(e.g., 3.5) of ordinal numbers of the data pulses CDE2 to CDE5corresponding to the respective detection timings at which the emissionsignal is detected, as X coordinates.

According to a third embodiment, the pen 150 may determine an ordinalnumber of a data pulse CDE5 corresponding to the timing at which theemission is detected last in time, among the data pulses CDE2 to CDE5corresponding to the respective detection timings at which the emissionsignal is detected, as X coordinates (or Y coordinates).

As described above, the display device 100 according to the presentdisclosure may acquire touch coordinates by allowing a self-emissionelement included in each pixel P to emit light for acquiring the touchcoordinates and receiving light emitted from the self-emission elementthrough the pen 150 without a separate touch IC or a separate touchscreen panel for detecting a touch using the pen 150.

Hereinafter, the configuration of a timing controller according to thepresent disclosure will be described in detail with reference to FIG. 3.FIG. 3 is a block diagram of the timing controller shown in FIG. 1.Referring to FIG. 3, the timing controller 110 may include an imagereceiving circuit 200, a display image quality and compensationprocessing circuit 300, a bridge IC 310, and a control circuit 400.

The image receiving circuit 200 may receive an image source from theoutside and may include a fetch unit 202 and a converter 204 as shown inFIG. 3.

The fetch unit 202 may perform pre fetch on image data from an imagesource input from the outside, for example, the digital video dataIdata.

The converter 204 may convert the image data Idata acquired by the fetchunit 202 into system data to be used in the timing controller 110 andmay transmit the converted system data to the display image quality andcompensation processing circuit 300.

The display image quality and compensation processing circuit 300 maywrite the system data (or image data) in a memory 320 through the bridgeIC 310 or may read the system data (or image data) stored in the memory320.

The display image quality and compensation processing circuit 300 maycompensate for the system data received from the image receiving circuit200 or the bridge IC 310 using a predetermined compensation algorithm ormay convert the system data into the form to be processed by the sourcedriving circuit 120 to generate the image data Idata′. The display imagequality and compensation processing circuit 300 may output the generatedimage data Idata′ to the control circuit 400.

The bridge IC 310 may convert format of the system data into formatappropriate for the memory 320 and may store the converted system datain the memory 320 or may read the system data stored in the memory 320and may provide the system data to the display image quality andcompensation processing circuit 300. The bridge IC 310 may adjust thetiming at which data stored in the memory 320 is read. According to anembodiment, the memory 320 may include a volatile memory and anon-volatile memory.

The bridge IC 310 according to the present disclosure may readresolution information of the display panel 140 for acquiring touchcoordinates, an X coordinate precision value, and a Y coordinateprecision value from the memory 320 and may transmit the readinformation to the control circuit 400 through the display image qualityand compensation processing circuit 300.

The control circuit 400 may generate control data and may output thegenerated control data together with the image data Idata′, the Xcoordinate emission data Tdata_X, or the Y coordinate emission dataTdata_Y, received from the display image quality and compensationprocessing circuit 300.

To this end, the control circuit 400 may include a control datageneration circuit 410, a coordinate data generation circuit 420, and aselection circuit 440. The selection circuit 440 may be embodied as amultiplexer.

The control data generation circuit 410 may generate control data forcontrolling an operation of the source driving circuit 120 and the gatedriving circuit 130 based on timing control data (TCTR) received fromthe outside. In detail, the control data generation circuit 410 maygenerate the source control data SCD for controlling an operation of thesource driving circuit 120 and the gate control data GCD for controllingan operation of the gate driving circuit 130.

In this case, the source control data SCD generated by the control datageneration circuit 410 according to the present disclosure may includethe first data output enable signal for outputting the image dataIdata′, the second data output enable signal for outputting the Xcoordinate emission data Tdata_X, and the third data output enablesignal for outputting the Y coordinate emission data Tdata_Y.

The gate control data GCD generated by the control data generationcircuit 410 according to the present disclosure may include the firstgate output enable signal for outputting the image data Idata′, thesecond gate output enable signal for outputting the X coordinateemission data Tdata_X, and the third gate output enable signal foroutputting the Y coordinate emission data Tdata_Y.

FIG. 4 is a diagram showing an example of a method of generating a firstdata output enable signal by the control data generation circuit shownin FIG. 3. As seen from FIGS. 3 to 4, the control data generationcircuit 410 may generate a first data output enable signal Int_DE2 byadjusting a period of a data enable signal Int_DE1 input from theoutside to be short (or small) during the display field DF.

According to the embodiment, when the display panel 140 has a resolutionof w×h, the control data generation circuit 410 may generate the firstdata output enable signal Int_DE2 having h data pulses DE_1 to DE_h byadjusting a period of each of h data pulses DE_1′ to DE_h′ included inthe data enable signal Int_DE1 to be short during the display field DF.

As such, the X coordinate field XCF and the Y coordinate field YCF maybe additionally designated in the 1 frame duration while a generalreference (e.g., 120 Hz or 60 Hz) is satisfied by adjusting a period ofeach of data pulses DE_1 to DE_h included in the first data outputenable signal Int_DE2 for displaying an actual image to be short.

The control data generation circuit 410 may also additionally generatecontrol data for controlling a gamma control signal or a powermanagement IC (PMIC).

According to an embodiment, the control data generation circuit 410 maygenerate the source control data SCD and the gate control data GCD byapplying resolution information, an X coordinate precision value, and aY coordinate precision value of the display panel 140, which arereceived through the display image quality and compensation processingcircuit 300.

In detail, the control data generation circuit 410 may set the Xcoordinate precision value to the number (i) of the data lines DL1 toDLw to which the second data voltage is simultaneously applied duringthe X coordinate field XCF, and may calculate the number (m) of datapluses to be included in the second data output enable signal based onthe X-direction resolution value and the X coordinate precision value ofthe display panel 140.

According to an embodiment, the number (m) of data pluses to be includedin the second data output enable signal may be calculated using Equation1 below.m=w/Xcp  [Equation 1]

In Equation 1, w indicates an X-direction resolution value of thedisplay panel 140, and Xcp indicates an X coordinate precision value.

According to the embodiment, the control data generation circuit 410 maygenerate the second data output enable signal to correspond to each of mdata pulses X_DE1 to X_DEm included in the second data output enablesignal in units of i data lines. In this case, the control datageneration circuit 410 may generate the second gate output enable signalto simultaneously supply a gate pulse to all of the gate lines GL1 toGLh.

The control data generation circuit 410 may set the Y coordinateprecision value to the number (j) of the gate lines GL1 to GLh to whichthe third data voltage is simultaneously applied during the Y coordinatefield YCF, and may calculate the number (n) of data pulses to beincluded in the third data output enable signal in order to apply thethird data voltage in units of j gate lines during the Y coordinatefield YCF according to the resolution and the Y coordinate precisionvalue of the display panel 140.

According to an embodiment, the number (n) of data pulses to be includedin the third data output enable signal may be calculated using Equation2 below.n=h/Ycp  [Equation 2]

Here, h indicates a Y-direction resolution value of the display panel140, and Ycp indicates a Y coordinate precision value.

According to the embodiment, the control data generation circuit 410 maygenerate the third gate output enable signal to sequentially supply gatepulses in units of j gate lines, and may generate the third data outputenable signal including n data pulses Y_DE1 to Y_DEn for simultaneouslyapplying the third data voltage to all of the data lines DL1 to DLw inunits of j gate lines.

The coordinate data generation circuit 420 may generate the X coordinateemission data Tdata_X for acquiring X coordinates and the Y coordinateemission data Tdata_Y for acquiring Y coordinates. According to anembodiment, since the X coordinate emission data Tdata_X and Ycoordinate emission data Tdata_Y are not for image display but for touchcoordinates acquisition, when emitting, emission may not be perceived bythe user's eye. Accordingly, the X coordinate emission data Tdata_X andY coordinate emission data Tdata_Y may be generated to have a lowgrayscale value.

The coordinate data generation circuit 420 may generate emission data toallow all pixels to emit light with the same color. However, accordingto another embodiment, the coordinate data generation circuit 420 maygenerate the X coordinate emission data Tdata_X and the Y coordinateemission data Tdata_Y to allow each pixel to emit light with randomcolor. According to the present disclosure, the X coordinate emissiondata Tdata_X and the Y coordinate emission data Tdata_Y are generated toallow each pixel to emit light with random color because the Xcoordinate emission data Tdata_X and the Y coordinate emission dataTdata_Y are generated at a final output end without being image-qualityprocessed and compensation-processed, and as a ghost image is occurredby pixels emitting light in order to acquire touch coordinates or thedisplay panel 140 is degraded due to continuous emission with samecolor.

Accordingly, the coordinate data generation circuit 420 according to thepresent disclosure may allow all pixels to emit light with random color,may randomly vary color of emission data in units of frames and in unitsof i data lines to which the second data voltage is simultaneouslyapplied, or may vary color of emission data in units of frames and inunits of j gate lines to which gate pulses are simultaneously applied.

FIG. 5 is a diagram showing an example of a method of randomly settingcolor of emission data. As shown in (a) of FIG. 5, regions C11 to C1 wwhich emits light to acquire X coordinates in an N^(th) frame andregions C21 to C2 w emit light to acquire X coordinates in an (N+1)^(th)frame may be the same region, respectively and each of the regions C11to C1 w and C21 to C2 w may include one data line or may include i (ibeing a natural number equal to or greater than 2) data lines.

In the example shown in (a) of FIG. 5, pixels of each of the regions C11to C1 w which emit light to acquire X coordinates may emit light withrandom color, pixels of each of the regions C21 to C2 w which emit lightto acquire X coordinates may emit light with random color, and pixelsincluded in regions C11 and C21, C12 and C22, C13 and C23, C14 and C24,and C1 w and C2 w, which correspond to each other in an N^(th) frame andan (N+1)^(th) frame, may also emit light with different colors.

That is, the coordinate data generation circuit 420 may generateemission data in such a way that a region C11 including pixels connectedto one or i data lines corresponding to a first data pulse X_DE1 among mdata pulses X_DE1 to X_DEm included in the second data output enablesignal in the N^(th) frame has first color. The coordinate datageneration circuit 420 may generate emission data in such a way that aregion C12 including pixels connected to one or i data linescorresponding to a second data pulse X_DE2 has second color.

In addition, the coordinate data generation circuit 420 may generateemission data in such a way that a region C11 including pixels connectedto one or i data lines corresponding to the first data pulse X_DE1 amongm data pulses X_DE1 to X_DEm included in the second data output enablesignal in the N^(th) frame has first color. The coordinate datageneration circuit 420 may generate emission data in such a way that aregion C21 including pixels connected to one or i data linescorresponding to the first data pulse X_DE1 in the (N+1) frame has thirdcolor.

Similarly, as shown in (b) of FIG. 5, regions C31 to C3 h which emitslight to acquire Y coordinates in the N^(th) frame and regions C41 to C4h which emits light to acquire Y coordinates in the (N+1)^(th) frame maybe the same region, respectively and each of the regions C31 to C3 h andC41 to C4 h may include one gate line or may include j (j being anatural number equal to or greater than 2) gate lines.

In the example shown in (b of FIG. 5, pixels of each of the regions C31to C3 h which emit light to acquire Y coordinates may emit light withrandom color, pixels of each of the regions C41 to C4 h which emit lightto acquire Y coordinates may emit light with random color, and pixelsincluded in regions C31 and C41, C32 and C42, and C3 h and C4 h, whichcorrespond to each other in the N^(th) frame and the (N+1)^(th) framemay also emit light with different colors. Thereby, a ghost image maynot be occurred on the display panel 140 with respect to pixels thatemit light to acquire touch coordinates.

That is, the coordinate data generation circuit 420 may generateemission data in such a way that a region C31 including pixels connectedto one or j gate lines to which a third data voltage is simultaneouslyapplied according to a first data pulse Y_DE1 among n data pulses Y_DE1to Y_DEn included in the third data output enable signal in the N^(th)frame has fourth color. The coordinate data generation circuit 420 maygenerate emission data in such a way that a region C32 including pixelsconnected to one or j gate lines to which the third data voltage issimultaneously applied according to a second data pulse Y_DE2 has fifthcolor.

In addition, the coordinate data generation circuit 420 may generateemission data in such a way that the region C31 including pixelsconnected to one or j gate lines to which the third data voltage issimultaneously applied according to the first data pulse Y_DE1 among then data pulses Y_DE1 to Y_DEn included in the third data output enablesignal in the N^(th) frame has fourth color. The coordinate datageneration circuit 420 may generate emission data in such a way that aregion C41 including pixels connected to one or j gate lines to whichthe third data voltage is simultaneously applied according to the firstdata pulse Y_DE1 among the n data pulses Y_DE1 to Y_DEn included in thethird data output enable signal in the (N+1)^(th) frame has sixth color.

The coordinate data generation circuit 420 may output the generated Xcoordinate emission data Tdata_X and Y coordinate emission data Tdata_Yto the selection circuit 440.

The selection circuit 440 may selectively output the image data Idata′from the display image quality and compensation processing circuit 300,or the X coordinate emission data Tdata_X and the Y coordinate emissiondata Tdata_Y that are generated by the coordinate data generationcircuit 420 based on a selection signal SEL output from the displayimage quality and compensation processing circuit 300.

For example, the selection circuit 440 may output the image data Idata′in response to the selection signal SEL having a first level and theselection circuit 440 may output the X coordinate emission data Tdata_Xor the Y coordinate emission data Tdata_Y in response to the selectionsignal SEL having a second level.

The timing controller 110 according to the present disclosure may setcoordinate precision depending on the size of a pixel included in thedisplay panel 140 and may store the set coordinate precision in thememory 320.

FIG. 6 is a diagram showing an example of a method of setting coordinateprecision by the timing controller 110. Referring to FIG. 6, when thedisplay device 100 has a medium size (e.g., 50 inches), the pen 150 maycalculate (or acquire) touch coordinates in units of regions RG1including four pixels (CASE4), and when the display device 100 has alarge size (e.g., 88 inches), the pen 150 may calculate (or acquire)touch coordinates in units of regions RG2 including one pixel (CASE5).Accordingly, when the display device 100 has a medium size, X and Ycoordinate precision values may be set to 4, and when the display device100 has a large size, the X and Y coordinate precision values may be setto 1.

For example, assuming that the display panel 140 has 1920×1080 pixels(or resolution of 1920×1080), an X coordinate precision value (Xcoordinate precision value) is 8 (or 8 pixels), and a Y coordinateprecision value has 4 (or 4 lines), the timing controller 110 maygenerate a first data output enable signal having 1080 data pulses DE_1to DE_1080 in the display field DF, may generate a second data outputenable signal having 240(=1920/8) data pulses X_DE1 to X_DE240 in the Xcoordinate field XCF, and may generate a third data output enable signalhaving 270(=1080/4) data pulses Y_DE1 to Y-DE270 in the Y coordinatefield YCF.

According to the embodiment, the display panel 140 may allow all pixelsconnected to 9^(th) to 16^(th) data lines to emit light based onresolution of w (e.g., 1920) in the X coordinate field XCF according tothe second data pulse X_DE2 of the second data output enable signal.Similarly, the display panel 140 may allow all pixels connected to fifthto eighth gate lines to emit light based on resolution of h (e.g., 1080)according to the second data pulse Y_DE2 of the third data output enablesignal in the Y coordinate field.

In this case, the pen 150 may acquire an emission signal at the timingat which the second data pulse X_DE2 of the second data output enablesignal is output and may acquire an emission signal at the timing atwhich the second data pulse Y_DE2 of the third data output enable signalis output, X coordinates may be recognized as 2, and Y coordinates maybe recognized as 2.

According to an embodiment, when the timing controller 110 is connectedto a new display panel, resolution of the newly connected display panelmay be determined, and the second and third data output enable signalsmay be newly generated according to the determination result.

FIG. 7 is a conceptual diagram for explaining an operation of the timingcontroller shown in FIG. 3.

For convenience of description, FIG. 7 illustrates the case in which afirst frame includes a vertical synchronization signal Vsync, thedisplay field DF for outputting image data, the X coordinate field XCFfor outputting X coordinate emission data for acquiring X coordinates,and the Y coordinate field YCF for outputting Y coordinate emission datato acquire Y coordinates in the state order.

During the X coordinate field XCF, the coordinate data generationcircuit 420 may generate the X coordinate emission data Tdata_X, and thecontrol data generation circuit 410 may output the second data outputenable signal including m data pulses X_DE1 to X_DEm and the second gateoutput enable signal for simultaneously applying the gate pulse GPthrough all gate lines.

The gate driving circuit 130 may simultaneously output the gate pulse GPto the h gate lines GL1 to GLh in response to the second gate outputenable signal. Accordingly, the pixels P connected to the gate lines GL1to GLh may be connected to the data lines DL1 to DLw, respectively, inresponse to the simultaneously applied gate pulse GP.

The source driving circuit 120 may convert the X coordinate emissiondata Tdata_X into the second data voltage, and may output the seconddata voltage in units of i data lines in synchronization with the m datapulses X_DE1 to XDEm according to the second data output enable signal.Accordingly, OLED of a pixel connected to each data line may emit lightin units of i data lines.

Hereinafter, an example of an operation of a timing controller accordingto the present disclosure will be described in more detail.

As a first example, assuming that a display panel has 1920×1080 pixels(or resolution of 1920×1080), an X coordinate precision value has 8 (or8 pixels), and a Y coordinate precision value is 4 (or 4 lines), in thedisplay field DF, the first data output enable signal having 1920 datapulses DE_1 to DE_1920 and the first gate output enable signal forallowing 1080 gate lines to output gate pulses using a row sequentialmethod may be generated. In this case, when each of data pulses includedin the first data output enable signal is in a high level, the firstdata voltage may be applied in units of 1 data line.

In the X coordinate field XCF, m is set to 240, and thus the second dataoutput enable signal having 240 data pulses X_DE1 to X_DE240 and thesecond gate output enable signal for allowing 1080 gate lines tosimultaneously output the gate pulses GP may be generated. In this case,the X coordinate precision value is 8, and thus when each of data pulsesincluded in the second data output enable signal is in a high level, thesecond data voltage may be applied in units of 8 data lines.

For example, while the first data pulse X_DE1 included in the seconddata output enable signal is maintained in a high level, the gate pulseGP may be applied to all gate lines GL1 to GL1080 and the second datavoltage is output to the first to eighth data lines DL1 to DL8corresponding to a first data line group DLG1, and thus all pixelsconnected to the first data line group DLG1 may emit light.

Continuously, while the second data pulse X_DE2 is maintained in a highlevel, the gate pulse GP may be applied to all of the gate lines GL1 toGL1080 and the second data voltage may be output to ninth to sixteenthdata lines DL9 to DL16 corresponding to a second data line group DLG2,and accordingly, all pixels connected to the second data line group DLG2emit light.

Lastly, while a 240^(th) data pulse X_DE240 are maintained in a highlevel, the gate pulse GP may be applied to all of the gate lines GL1 toGL1080 and the second data voltage may be output to 1913^(th) to1920^(th) data lines DL1913 to DL1920 corresponding to a 240^(th) dataline group DLG240, and thus all pixels connected to the 240^(th) dataline group DLG240 may emit light.

In the Y coordinate field YCF, since the Y coordinate precision value is4, j is set to 4 and n is set to 270, and accordingly, a third dataoutput enable signal DE having 270 data pluses Y_DE1 to YDE270 forsimultaneously applying the third data voltage to 1920 data lines inunits of 4 gate lines may be generated, and the third gate output enablesignal for applying the gate pulse GP in units of 4 gate lines using arow sequential method may be generated. Accordingly, the third datavoltage may be sequentially applied to all pixels connected to acorresponding gate lines in units of j gate lines.

For example, while the first data pulse Y_DE1 included in the third dataoutput enable signal is maintained in a high level, the gate pulse GPmay be applied to first to fourth gate lines GL1 to GL4 corresponding toa first gate line group GLG1 and the third data voltage may be output tothe all data lines DL1 to DL1920, and thus all pixels connected to thefirst gate line group GLG1 may emit light.

Continuously, while the second data pulse Y_DE2 included in the thirddata output enable signal is maintained in a high level, the gate pulseGP may be applied to fifth to eighth gate lines GL5 to GL8 correspondingto a second gate line group GLG2 and the third data voltage may beoutput to the all data lines DL1 to DL1920, and thus all pixelsconnected to the second gate line group GLG2 may emit light.

Lastly, while a 270^(th) data pulse Y_DE270 included in the third dataoutput enable signal is maintained in a high level, the gate pulse GPmay be applied to 1077th to 1080^(th) gate lines GL1077 to GL1080corresponding a 270^(th) gate line group GLG270 and the third datavoltage may be output to all the data lines DL1 to DL1920, andaccordingly, all pixels connected to a 270^(th) gate line group GLG 250may emit light.

As a second example, assuming that a display panel has 1920×1080 pixels(or resolution of 1920×1080) and both the X coordinate precision valueand the Y coordinate precision have 1 (or 1 pixel), in the display fieldDF, the first data output enable signal having 1920 data pulses DE_1 toDE_1920 and the first gate output enable signal for allowing 1080 gatelines to output gate pulses using a row sequential method may begenerated. In this case, when each of data pulses included in the firstdata output enable signal is in a high level, the first data voltage maybe applied in units of 1 data line.

In the X coordinate field XCF, a second data output enable signal having1920 data pulses X_DE1 to X_DE1920 and a second gate output enablesignal for simultaneously outputting gate pulses to 1080 gate lines maybe generated. Accordingly, while the first data pulse X_DE1 included inthe second data output enable signal is maintained in a high level, thegate pulse GP may be applied to all gate lines and the second datavoltage may be output to the first data line DL1, and thus all pixelsconnected to the first data line DL1 may emit light.

Continuously, while the second data pulse X_DE2 is maintained in a highlevel, the gate pulse GP may be applied to all gate lines and the seconddata voltage may be output to the second data line DL, and thus allpixels connected to the second data line DL2 may emit light.

Lastly, while a 1920^(th) data pulse X_DE1920 is maintained in a highlevel, the gate pulse GP may be applied to all gate lines and the seconddata voltage may be output to a 1920^(th) data line DL1920, and thus allpixels connected to a 1920^(th) data line DL1920 may emit light.

In the Y coordinate field YCF, the third data output enable signal DEhaving h data pulses Y_DE1 to YDEh for simultaneously applying a thirddata voltage to 1920 data lines in units of 1 gate line may begenerated, and a third gate output enable signal for applying gatepulses in units of 1 gate line using a row sequential method may begenerated. Thus, while the first data pulse Y_DE1 included in the thirddata output enable signal is maintained in a high level, the gate pulseGP may be applied to a first gate line GL1 and the third data voltagemay be output to all of the data lines DL1 to DL1920, and thus allpixels connected to the first gate line GL1 may emit light.

Continuously, while the second data pulse Y_DE2 included in the thirddata output enable signal is maintained in a high level, the gate pulseGP may be applied to a second gate line GL2 and the third data voltagemay be output to all of the data lines DL1 to DL1920, and thus allpixels connected to the second gate line GL2 may emit light.

Lastly, while a 1080^(th) data pulse Y_DE1080 included in the third dataoutput enable signal is maintained in a high level, the gate pulse GPmay be applied to a 1080th gate line GL1080 and the third data voltagemay be output to all the data lines DL1 to DL1080, and thus all pixelsconnected to a 1080^(th) gate line GL1080 may emit light.

FIG. 8 is a block diagram of an electronic device including the displaydevice shown in FIG. 1. An electronic device 500 may include the displaydevice 100 including the display panel 140, a pen 150 (or an active pen)including a wireless transmitter 151, a main board 505 including a mainchip 510, and a display control device 530.

Vertical synchronization signals of the main chip 510 and the pen 150may be synchronized with each other through handshaking. Thus, thevertical synchronization signal of the main chip 510 may be synchronizedwith a touch vertical synchronization signal TVsync output from thedisplay control device 530, and then the vertical synchronization signalof the main chip 510 may be lastly synchronized with the verticalsynchronization signal of the pen 150. In this case, an internalvertical synchronization signal Int_Vsync of the timing controller 110may also be synchronized with the touch vertical synchronization signalTVsync output from the display control device 530, and thus the verticalsynchronization signal of the main chip 510 may also be synchronizedwith the internal vertical synchronization signal Int_Vsync of thetiming controller 110.

The pen 150 may transmit X coordinates recognized in the X coordinatefield XCF and Y coordinates recognized in the Y coordinate field YCF toa wireless receiver 520 connected to the main chip 510 through wirelesstransmitter 151.

The main chip 510 may convert the X coordinates and Y coordinatestransmitted from the pen 150 into pattern data desired by a user. Forexample, when coordinates recognized (or determined) by the pen 150 onor above a first region in the display panel 140 is (100, 100), the mainchip 510 may convert the coordinates (100, 100) transmitted from the pen150 into pattern data (e.g., a point, a line, a figure, or a graphicuser interface (GUI)) and may transmit the pattern data to the displaycontrol device 530.

The display control device 530 may transmit the pattern data to thedisplay device 100. Thus, the display device 100 may display the patterndata (e.g., a point, a line, a figure, or GUI) in a first regioncorresponding to the coordinates (100, 100).

In FIG. 8, TVsync indicates a vertical synchronization signaltransmitted to the main chip 510 from the display control device 530,PVsync indicates a vertical synchronization signal output from thewireless transmitter 151 of the pen 150, WPVSync indicates a verticalsynchronization signal of the wireless receiver 520 of the main chip510, BVsync indicates a vertical synchronization signal transmitted tothe display control device 530 from the main chip 510, D1 indicates Xcoordinates, D2 indicates Y coordinates, and D3 and D4 indicate patterndata displayed on the display device 100.

It should be understood by those skilled in the art that the presentdisclosure can be embodied in other specific forms without changing thetechnical concept and essential features of the present disclosure.

All disclosed methods and procedures described herein may beimplemented, at least in part, using one or more computer programs orcomponents. These components may be provided as a series of computerinstructions through any conventional computer-readable medium ormachine-readable medium including volatile and nonvolatile memories suchas random-access memories (RAMs), read only-memories (ROMs), flashmemories, magnetic or optical disks, optical memories, or other storagemedia. The instructions may be provided as software or firmware, andmay, in whole or in part, be implemented in a hardware configurationsuch as application-specific integrated circuits (ASICs),field-programmable gate arrays (FPGAs), digital signal processors(DSPs), or any other similar device. The instructions may be configuredto be executed by one or more processors or other hardwareconfigurations, and the processors or other hardware configurations areallowed to perform all or part of the methods and procedures disclosedherein when executing the series of computer instructions.

According to the present disclosure, touch coordinates of a pen thatcomes into contact with a display panel may be sensed using lightemitted from a self-emission element included in a pixel of the displaypanel, and accordingly, needless to say, the display panel does notrequire a separate touch sensing device or touch IC for sensing touchcoordinates, thereby realizing a compact display device and alsoreducing manufacturing costs of the display device.

According to the present disclosure, 1 frame duration may betime-divided, and emission data for acquiring touch coordinates of a penthat comes into contact with the display panel and image data fordisplaying an actual image may be output, thereby acquiring touchcoordinates without degradation of image quality or resolution of anactual image.

According to the present disclosure, the number of pixels that issupposed to emit light for acquiring touch coordinates may be varieddepending on the resolution and coordinate precision value of thedisplay panel, thereby acquiring touch coordinates appropriate for theresolution of the display panel.

According to the present disclosure, color of emission data foracquiring touch coordinates may be randomly set, and thus theself-emission element may be prevented from being degraded due torepeated output of specific color only, and occurring ghost image due toemission with specific color may be prevented.

Therefore, the above-described embodiments should be understood to beexemplary and not limiting in every aspect. The scope of the presentdisclosure will be defined by the following claims rather than theabove-detailed description, and all changes and modifications derivedfrom the meaning and the scope of the claims and equivalents thereofshould be understood as being included in the scope of the presentdisclosure.

What is claimed is:
 1. A timing controller for controlling emission ofan emission element for recognizing touch coordinates, the timingcontroller comprising: a coordinate data generation circuit configuredto generate X coordinate emission data for acquiring X coordinates and Ycoordinate emission data for acquiring Y coordinates of touchcoordinates; a selection circuit configured to time-divide 1 frameduration, to output the X coordinate emission data to a display drivingcircuit during an X coordinate field, and to output the Y coordinateemission data to the display driving circuit during a Y coordinatefield; and a control data generation circuit configured to outputcontrol data for allowing each pixel to emit light in units of data linegroups including i (i being a natural number equal to or greater than 2)data lines using the X coordinate emission data during the X coordinatefield and for allowing each pixel to emit light in units of gate linegroups including j (j being a natural number equal to or greater than 2)gate lines using the Y coordinate emission data during the Y coordinatefield, to the display driving circuit, wherein the control datageneration circuit is configured to allow pixels connected to two ormore gate lines included in each gate line group to simultaneously emitlight in units of the gate line groups during the Y coordinate field. 2.The timing controller of claim 1, wherein: a display panel comprises mdata line groups obtained by grouping w data lines in units of the idata lines and n gate line groups obtained by grouping h gate lines inunits of the j gate lines; and the control data comprises a first dataoutput enable signal comprising m data pulses for sequentiallyoutputting the X coordinate emission data to the m data line groupsduring the X coordinate field, and a first gate output enable signal forsimultaneously outputting gate pulses to the h gate lines in response toeach of the m data pulses.
 3. The timing controller of claim 2, whereinthe m is determined using an X-direction resolution value and an Xcoordinate precision value of the display panel.
 4. The timingcontroller of claim 1, wherein: a display panel comprises m data linegroups obtained by grouping w data lines in units of the i data linesand n gate line groups obtained by grouping h gate lines in units of thej gate lines; and the control data comprises a second data output enablesignal comprising n data pulses for simultaneously outputting the Ycoordinate emission data to the w data lines in units of the gate linegroups during the Y coordinate field, and a second gate output enablesignal for sequentially outputting gate pulses synchronized with the ndata pulses, respectively, to each of the gate line groups, during the Ycoordinate field.
 5. The timing controller of claim 4, wherein the n isdetermined using a Y-direction resolution value and a Y coordinateprecision value of the display panel.
 6. The timing controller of claim1, wherein: the i is determined as an X coordinate precision value, andthe j is determined as a Y coordinate precision value; and the Xcoordinate precision value is determined as a number of X-directionpixels to be recognized by a pen at one time for acquiring the touchcoordinates among pixels included in a display panel, and the Ycoordinate precision value is determined as a number of Y-directionpixels to be recognized by the pen at one time among the pixels includedin the display panel.
 7. The timing controller of claim 1, wherein: theselection circuit outputs image data to the display driving circuitduring a display field included in the 1 frame duration; and the controldata comprises a third data output enable signal and a third gate outputenable signal for allowing each pixel to sequentially emit light inunits of 1 gate line during the display field.
 8. The timing controllerof claim 1, wherein the X coordinate emission data and the Y coordinateemission data have a grayscale value equal to or less than apredetermined reference to prevent emission of a pixel based on the Xcoordinate emission data and the Y coordinate emission data from beingperceived by a user's eye.
 9. The timing controller of claim 1, whereinthe X coordinates are determined using a detection timing at which anemission signal due to emission of a pixel that comes into contact witha pen during the X coordinate field is detected, and the Y coordinatesare determined using a detection timing at which an emission signal dueto emission of the pixel that comes into contact with the pen during Ycoordinate field is detected.
 10. An electronic device comprising: adisplay panel comprising m data line groups obtained by grouping w datalines in units of i (i being a natural number equal to or greater than2) data lines and n gate line groups obtained by grouping h gate linesin units of j (j being a natural number equal to or greater than 2) gatelines; a timing controller configured to time-divide 1 frame duration,to generate X coordinate emission data for acquiring X coordinates oftouch coordinates and first control data during an X coordinate field,and to generate Y coordinate emission data for acquiring Y coordinatesand second control data during a Y coordinate field; and a displaydriving circuit configured to allow each pixel to emit light in units ofthe data line groups using the X coordinate emission data according tothe first control data during the X coordinate field and to allow eachpixel to emit light in units of the gate line groups using the Ycoordinate emission data according to the second control data during theY coordinate field, wherein the display driving circuit is configured toallow pixels connected to two or more gate lines included in each gateline group to simultaneously emit light in units of the gate line groupsduring the Y coordinate field.
 11. The electronic device of claim 10,wherein: the first control data comprises a first data output enablesignal having m data pulses for sequentially outputting the X coordinateemission data to the m data line groups during the X coordinate field,and a first gate output enable signal for simultaneously outputting gatepulses to the h gate lines in response to each of the m data pulses. 12.The electronic device of claim 10, wherein: the second control datacomprises a second data output enable signal having n data pulses forsimultaneously outputting the Y coordinate emission data to the w datalines in units of the gate line groups during the Y coordinate field,and a second gate output enable signal for sequentially outputting gatepulses synchronized with the n data pulses, respectively, in units ofthe gate line groups during the Y coordinate field.
 13. The electronicdevice of claim 10, wherein the m is determined using an X-directionresolution value and an X coordinate precision value of the displaypanel, and the n is determined using a Y-direction resolution value anda Y coordinate precision value of the display panel.
 14. The electronicdevice of claim 10, wherein: the i is determined as an X coordinateprecision value, and the j is determined as a Y coordinate precisionvalue; and the X coordinate precision value is determined as a number ofX-direction pixels to be recognized by a pen at one time for acquiringthe touch coordinates among pixels included in a display panel, and theY coordinate precision value is determined as a number of Y-directionpixels to be recognized by the pen at one time among the pixels includedin the display panel.
 15. The electronic device of claim 10, furthercomprising a pen configured to acquire the touch coordinates via contactwith the display panel, wherein the pen determines the X coordinatesusing a first detection timing at which an emission signal of a pixelthat comes into contact with the pen is detected during the X coordinatefield, and determines the Y coordinates using a second detection timingat which an emission signal of a pixel that comes into contact with thepen is detected during the Y coordinate field.
 16. The electronic deviceof claim 15, wherein the pen determines an ordinal number of a firsttarget data pulse corresponding to a first detection timing of theemission signal among data pulses included in a first data output enablesignal during the X coordinate field as the X coordinates, anddetermines an ordinal number of a second target data pulse correspondingto a second detection timing of the emission signal among data pulsesincluded in a second data output enable signal in the Y coordinate fieldas the Y coordinates of the touch coordinates.
 17. The electronic deviceof claim 16, wherein the ordinal number of the first target data pulseis determined using a time difference to the first detection timing froma rising edge of a vertical synchronization signal, and the ordinalnumber of the second target data pulse is determined using a timedifference to the second detection timing from the rising edge of thevertical synchronization signal.
 18. The electronic device of claim 15,wherein, when detecting a plurality of emission signals from a pluralityof pixels during the X coordinate field or the Y coordinate field, thepen determines the X coordinates or the Y coordinates by averagingordinal numbers of target data pulses that respectively correspond todetection times of the plurality of emission signals or determines anyone of the target data pulses, as the X coordinates or the Ycoordinates.
 19. The electronic device of claim 10, wherein: the timingcontroller outputs image data and third control data for outputting theimage data to the display driving circuit during a display fieldincluded in the 1 frame duration; and the display driving circuit allowspixels to sequentially emit light in units of 1 gate line according tothe third control data during the display field.
 20. The electronicdevice of claim 10, wherein the X coordinate emission data and the Ycoordinate emission data have a grayscale value equal to or less than apredetermined reference to prevent emission of a pixel based on the Xcoordinate emission data and the Y coordinate emission data from beingperceived by a user's eye.